Best eSIM for Thailand (2026): Prices, Networks and Which Plan to Buy

The best eSIM for Thailand depends on how long you're staying and how much data you'll use. For a short trip with light use, 1GB for 7 days costs $5 at Wayfarro (Nomad: $5). For bigger plans, Nomad is the cheapest: 10GB for 30 days costs $10 there, against $11 at Airalo and $16 at Wayfarro. Wayfarro's prices come straight from its store; Nomad's and Airalo's were checked in October 2026. All three list AIS among their networks, the one travel guides rate best for islands and remote areas, so the choice mostly comes down to plan size, price and fair-use rules.

Best eSIM for Thailand: prices compared

These are Thailand-only plans, taken from each provider's own Thailand page and confirmed in US dollars. Providers change prices and run sales often, so check before you buy.

Plan	Wayfarro	Nomad	Airalo
1GB · 7 days	$5	$5	—
2GB · 15 days	$6.50	—	—
3GB · 30 days	$7.50	$6	—
5GB · 30 days	$11	$8	$8
10GB · 30 days	$16	$10	$11
20GB · 30 days	$37	—	$18
50GB · 30 days	$83	—	$27.50
Unlimited · 1 day	$5.50	—	—
Unlimited · 3 days	$10	—	—
Unlimited · 5 days	$16	—	$15
Unlimited · 7 days	$22	—	$21
Unlimited · 10 days	$25	$16 (sale)	$31
Unlimited · 15 days	$45	—	$39
Unlimited · 30 days	$87	$33	$49
Networks	AIS, dtac	True, AIS, dtac	True, AIS

How to read this table: Thailand is a market where Nomad and Airalo are cheaper than Wayfarro on most mid-size and large plans, and we'd rather tell you that than hide it. Wayfarro is level with Nomad on a 1GB week, the only one here with a 2GB, 15-day plan, and the only one with 1-day and 3-day unlimited plans. A dash means the provider doesn't sell that exact plan, or we couldn't confirm its US-dollar price.

Two things the table doesn't show. Airalo also sells shorter fixed plans, such as 1GB for 3 days at $4 and 3GB for 7 days at $6. Nomad lists a 50GB, 10-day plan at $12, and its 10-day unlimited plan was on sale at $16, down from $20, when we checked.

Wayfarro's unlimited rows are its Unlimited Lite plans: 1GB a day at full speed, then 512 kbps until the next day. It also sells Unlimited Essential (1GB a day, then 1.25 Mbps) and Unlimited Plus (2GB a day, then 2 Mbps). Seven days costs $26 on Essential and $53 on Plus.

Which Thailand eSIM should you buy?

There's no single best eSIM for Thailand for every traveler, so choose based on your trip:

• Stopover or long weekend in Bangkok, light use: A 1GB plan. Wayfarro's is $5 for 7 days, Nomad's is $5, and Airalo's $4 plan lasts 3 days. For a one-day stopover with heavy use, Wayfarro's 1-day unlimited plan is $5.50.
• One week, heavy use (video, social, maps all day): Nomad's 10-day unlimited plan at $16 is the cheapest while the sale lasts. If you want exactly 7 days, Airalo is $21 and Wayfarro is $22.
• Two weeks, moderate use: A 10GB, 30-day plan. Nomad is $10, Airalo is $11 and Wayfarro is $16.
• A month or longer: Nomad's 30-day unlimited plan at $33, or Airalo's 50GB plan at $27.50 if you'd rather have a fixed amount with no daily slowdown.
• Thailand plus Vietnam, Singapore or the Philippines: A regional plan saves you from buying a new eSIM at every border. Wayfarro's Southeast Asia eSIM covers all four countries from $7.
• Laptop tethering: Wayfarro allows hotspot use on every plan, and Nomad says its eSIMs support tethering too.

Thailand's networks: AIS, True and dtac

Thailand has two big mobile groups. One is AIS. The other is True Corporation, formed when True and dtac merged in March 2023, which still uses both brand names. So when a provider lists "True, dtac", that's one company's network, not two competing ones.

In Bangkok, Chiang Mai, Phuket and the other main tourist stops, either group works well. The difference shows up further out:

• Remote areas: Travel guides that cover Thai connectivity point to AIS as the safer choice for the mountains around Chiang Rai and for isolated islands.
• Gulf islands: A Koh Samui local guide reports dead spots for True and dtac on the island's south coast ring road between Lamai and Thong Krut, where AIS holds up.
• Ferries: The same guide says AIS keeps a signal for most of the Koh Samui–Koh Phangan crossing, while the others drop mid-way.

All three providers in this comparison list AIS, so on network alone any of them can be the best eSIM for Thailand's islands. Wherever you're headed, download offline maps before a long ferry ride or a drive into the hills.

What "unlimited" means on a Thailand eSIM

Every "unlimited" travel eSIM has a fair-use policy. After a certain amount of high-speed data each day, your speed drops until the allowance resets.

Wayfarro publishes its limits on the plan page: 1GB a day on Lite and Essential, 2GB a day on Plus, then 512 kbps, 1.25 Mbps or 2 Mbps for the rest of the day. Airalo states its limit clearly: speed falls to 1 Mbps after 5GB of use per day. Nomad says data continues at 512kbps once the daily high-speed allowance is used, and that the allowance resets every 24 hours from activation. Not every provider publishes its exact daily number, so read the plan details before you buy.

In practice, 512kbps to 1 Mbps is fine for maps, messaging and booking a ride. It's too slow for HD video or a video call. If your use is predictable, a fixed 10GB or 20GB plan often costs less than unlimited and never slows down.

How to set up an eSIM for Thailand

Install at home, turn it on when you land. It takes about two minutes:

1. Check your phone isn't locked to your home carrier and supports eSIM. iPhone XS and later, Google Pixel 3 and later, and most recent Samsung Galaxy phones do.
2. Install over Wi-Fi before you fly. Scan the QR code or use the one-tap install link. Step-by-step install guide.
3. Label it "Thailand" so it's easy to pick in settings.
4. When you land, set the Thailand eSIM as your mobile-data line and turn on Data Roaming for it. Travel eSIMs technically roam, so data won't connect without this setting.
5. Keep your home SIM on for calls and texts (turn its data roaming off to avoid charges) so you still get bank verification codes.

With Wayfarro, your plan's validity starts when the eSIM first connects in Thailand, not when you install it. If you run low, you can top up the same eSIM without reinstalling anything.

eSIM vs a tourist SIM at the airport

You can still buy a physical tourist SIM when you land. True says its tourist SIMs are sold 24/7 at airport counters and at True and dtac service centers. Its 8-day Happy Tourist Infinite SIM is listed at 449 baht.

There are two catches. First, every SIM sold in Thailand has to be registered with your passport under the telecom regulator's rules, with a maximum of three SIMs per person per brand. That means queuing at a counter after a long flight. Second, a physical SIM takes the place of your home SIM unless your phone has two slots, so you lose your home number while it's in.

A travel eSIM skips the counter. You install it before you leave and you're online while you're still waiting for your bags.

Before you fly: arrival card and festival season

Thailand's arrival card is now digital. Since 1 May 2025, all foreign nationals have to complete the Thailand Digital Arrival Card (TDAC) before entering, by air, land or sea. You submit it no more than 72 hours before arrival on the official immigration site, tdac.immigration.go.th. It's free, and Thai immigration has warned about fake sites that charge for it. Do it at home on Wi-Fi, the same evening you install your eSIM.

Coming for the lantern festivals? Loy Krathong falls on Tuesday 24 November 2026, and Chiang Mai's Yi Peng sky-lantern events run 24–25 November. Riverside roads close in the big cities on the night, and ride-hailing prices tend to surge from around 5pm. You'll want working data to find your way back on foot or book a Grab once the crowds thin. Chiang Mai and Sukhothai accommodation for those dates books up months ahead.

Bottom line

Nomad is the value pick for most Thailand plans, and Airalo is close behind with the widest range of sizes. Wayfarro is the best eSIM for Thailand if you want a light week at $5, a 2GB plan for a 15-day trip, a 1-day plan for a stopover, or one order that covers several countries. See Wayfarro's Thailand eSIM plans, or use the Trip Builder if Thailand is one stop on a longer route. Heading on to Hanoi or Ho Chi Minh City afterwards? There's a Vietnam eSIM too.